Compound instrument.



G. F. HALL.

COMPOUND INSTRUMENT.

APPLICATION FILED DEC. 18, 1909.

997,551, Patented July 11,1911.

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GEORGE F. HALL, OF NEWARK, NEW JERSEY, ASSIGNOR OF ONE-HALF T0 DELANCEYP. HARRIS, OF NEW YORK, N. Y.

COMPOUND INSTRUMENT.

Specification of Letters Patent.

Patented July 11, 1911.

To all whom it may concern:

Be it known that I, GEORGE. F. HALL, a citizen of the United States,residing at Newark, in the county of Essex and State of New Jersey, haveinvented certain new and useful Improvements in Compound Instruments;and I do hereby declare the following to be a full, clear, and'exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to characters of reference markedthereon, which form a part of this specification.

The present invention relates, generally, to improvements in compoundinstruments; and, the invention refers, more especially, to a combinedtee-square, bevel and triangle, the same being capable of adjustment toprovide a wide range of angles of varying degree. 7

The invention has for its principal object to provide a neat, compact,and simply constructed device of the character herein set forth, thesame being adapted to beused for many purposes, but being moreespecially adapted for use as a combined square and bevel, as well as adraftsmans appliance adapted to perform the functions of a teesquare andtriangle in such a manner, so as to render very easy of accomplishmentsuch drafting operations as the laying out of irregular angles,sectionizing, and other similar operations. I

Other advantages of the present invention, and other uses to which itmay be put, will be readily understood from an inspection of theaccompanying drawings, as well as from the following detaileddescription of the invention.

This invention consists, primarily, in'the novel construction ofcompound instrument hereinafter set forth; and the invention consists,furthermore, in the novel arrangements and combinations of the variousparts, as well as in the details of the construction thereof, all ofwhich will be hereinafter more fully described in the followingspecification and then finally embodied in the clauses of the claimswhich are appended to and which form an essential part of thisspecification.

The invention is clearly illustrated in the accompanying drawings, inwhich Figure 1 is a plan View of the novel compound instrument,embodying the principles of my present invention, the dotted lines ofsaid figure indicating two extremes of the various adjusted positions ofthe adjustablehead of said instrument; Fig. 2 is an edge view of thesame looking from right to left of said Fig. 1; Fig. 3 is a horizontalsection of the same, taken on line 33 in said Fig. 1; and Fig. 4: is asimilar section, taken on line 44 in said Fig. 1, both of these sectionsbeing viewed in the direction of the arrow a. Fig. 5 is a detailcross-section, taken on line 55 in said Fig. 1, this view being drawnupon an enlarged scale; and Fig. 6 is a bottom edge-view of theinstrument.

Similar characters of reference are employed in all of the said abovedescribed views, to indicate corresponding parts.

Referring now to the several figures of the said drawings, thereference-character 1 indicates the complete compound instrumentembodying the principles of the present invention, the same comprising amain body-portion 2 provided with a straight edge 3, and a suitable orconvenient scale 4 located along the said straight edge 3, said scalecomprising any suitable space-division or graduations. Extending fromone end of said main body-portion 2, and preferably at an angle offorty-five degrees therefrom, is an angle-arm 5. Pivotally connected tosaid angle-arm 5 and adjacent to the free end thereof, by means of thepivot-member 6, is an adjustable head 7 The said adjustable head 7comprises a plate or sheet of metal which is bent or doubled upon itselfso as to'form a pair of forwardly extending members 8 and 8 registeredone above the other in such a manner so as to leave an in-.

tervening space 9 adapted toreceive therein the said, body-portion 2 andthe angle-arm 5, so that said forwardly extending members 8 and 8 arerespectively arranged one upon eaohside of said body-portion 2 and saidangle-arm 5. The doubled-over edge 10 of the said adjustablehead 7 isprovided at its free end with a short inwardly extending slot 11,sufficiently deep to allow the'free endsof the respective forwardlyextending members 8 and 8 to extend over and upon the respective sidesof said main body-portion 2. The said doubled-over edge 10 is furtherprovided with another slot 12 which extends from the pivoted end of saidadjustable head 7 outwardly to within a short distance of the inner endof said inwardly extending slot 11, this said slot 12 permitting therespective forwardly extending members 8 and 8 to extend over and uponthe respective sides of the said anglearm 5. The said forwardlyextending members 8 and 8 are each provided upon one of theirlongitudinal edges with a flange 13 and 13 respectively. The saidflanged edges of said forwardly extending members 8 and 8 are joined toa flange-plate 141, the longitudinal edges of which are turned over andaround said flanges 18 and 13 so as to form outwardly extending ribs 15and 15 the same extending at right angles to the respective members 8and 8 The said flange-plate 1 1 is also provided with slots 16 and 17,the same being respectively opposite the abovementioned slots 11 and 12.The said free ends of said forwardly extending members 8 and 8 arepreferably chamfered or cut so as to form a finder or indicating point18, which serves in connection with a proper scale 19, indicatingdegrees of angles with which the said main body-portion 2 is provided.The said forwardly extending mem bers 8 and 8 are provided with slottedpor tions 20 and 20 the same being located at or near the free ends ofsaid forwardly extending members 8 and 8 and extending parallel to andwithin a short distance from the respective ribs 15 and 15 These saidslotted portions 20 and 20 are further adapted to register one above theother. Movably arranged within said slotted portions 20 and 20 andadapted to project therethrough is a bolt 21. Arranged upon the shank ofsaid bolt 21 are washer-like members 22 and 22 adapt-ed to engage therespective outer surfaces of said forwardly extending members 8 and 8The said members 22 and 22 are respectively provided with thestraight-edges or portions 23 and 23 which are adapted to engage theinner sides of the respective ribs 15 and 15 in such a manner, so as toprevent said members from turning. Said bolt 21 is further provided atits free end with a screwthreaded portion 24 adapted to receive athumb-nut 25. WVhen said adjustable head 7 has been arranged, so as toproduce in connection with said main body-portion 2 and its angle-arm 5,any desired angle or bevel, the said bolt 21 is moved in said slottedportions 20 and 20 until it is brought against the inner edge of saidmain body-portion 2, the said thumb-nut 25 is then screwed down tightlyso as to cause the respective washerlike members 22 and 22 to bind uponand force the free ends of the forwardly extending members 8 and 8 intight binding engagement with said main body-portion 2, thus causing thesaid adjustable head 7 to be firmly and securely held in its adjustedrelation to produce the desired angle or bevel. Secured by means ofscrews, or in any other suitable manner, to the upper surface of saidadjustable head 7 is the baseplate 26 of a spirit-level 27, thusproviding in connection with the other novel features of my presentdevice, the additional function of a spirit-level. The said mainbodyportion 2 is further provided with a perforation 28, the same beingformed with a wedge-shaped cut-away portion 29 the bottom of which isopposite one of the main graduations of said scale 4. In like manner,said main body-portion 2 is provided with a plurality of perforations 30each having a wedge-shaped cut-away portion 31 the bottom of which isopposite one of the main graduations of said scale 4:. Theseperforations serve as a means for striking a wide arc, or the like. Themanner of their use is as follows :A sharp instrument, such as abrad-awl, or the like, is inserted in the perforation 28 so as to beengaged by the bottom of said cut-away portion 29; in like manner apencil, or other marking device, is inserted in any one of saidplurality of perforations 80, so that the point thereof is engaged bythe cutaway portion 31, and by swinging the main bodyportion 2 upon saidbrad-awl, as a center, the pencil, or other marking device may be causedto strike a circle, arc, or the like, as will be clearly understood.

It will be clearly apparent, that the novel device constructed andcombined in the manner above described, will readily lend itself to theaccomplishment of many purposes; and, its use will be found serviceablenot only in drafting and such kindred operations, but in building andconstruction work of various kinds.

I am aware that changes may be made in the various arrangements andcombinations of the several parts without departing from the scope of mypresent invention. Hence, I do not limit my invention to the exactarrangements and combinations of the parts as herein described and asillustrated in the accompanying drawings, nor do I confine myself to theexact details of the construction of the said parts.

I claim 1. A compound instrument comprising a main body-portion, havingan angularly extending arm formed integral with the said mainbody-portion at the one end thereof, and a head pivotally connected atits one end with the said arm, the said head comprising a sheet-metalplate which is doubled upon itself so as to form a pair of forwardlyextending members, said members being separated to provide a pair ofinter vening spaces, one of said spaces being of greater length than theother space, and all arranged so that the said forwardly extendingmembers will respectively straddle the said mainbody-portion and thesaid angularly extending arm, and that the said for-- wardly extendingmembers are slidably arranged with relation to the said main bodyportion and the said angularly extending arm, substantially as and forthe purposes set forth.

2. A compound instrument comprising a main body-portion, having anangularly extending arm formed integral With the said main body-portionat the one end thereof, and a headpivotally connected at its one endwith the said arm, the said head comprising a sheet-metal plate which isdoubled upon itself so as to form a pair of forwardly extending members,said members being separated to provide a pair of intervening spaces,one of said spaces being of greater length than the other space, and allarranged so that the said forwardly extending members will respectivelystraddle the said main body-portion and the said angularly extendingarm, and that the said forwardly extending members are slidably arrangedwith relation to the said main body-portion and the said angularlyextending arm, and an outwardly extending rib connected with eachmember, substantially as and for the purposes set forth.

3. A compound instrument comprising a main body-portion, having anangularly extending arm formed integral with the said main body-portionat the one end thereof, and a head pivotally connected at its one endwith the said arm, the said head comprising a sheet-meta1 plate which isdoubled upon itself so as to form a pair of forwardly extending members,said members being separated to provide a pair of intervening spaces,one of said spaces being of greater length than the other space, and allarranged so that the said forwardly extending members will respectivelystraddle the said main body-portion and the said angularly extendingarm, and that the said forwardly extending members are slidably arrangedwith relation to the saidmain body-portion and the said angularlyextending arm, and means connected with the end-portions of said memberswhich are slidably arranged with relation to the main body-portion forlocking the head in an angularly disposed position with relation to thesaid main body-portion, substantially as and for the purposes set forth.

4. A compound instrument comprising a main body-portion, having anangularly extending arm formed integral with the said main body-portionat the one end thereof, and a head pivotally connected at its one endwith the said arm, the said head comprising a sheet-metal plate which isdoubled upon itself so as to form a pair of forwardly extending members,said members being separated to provide a pair of intervening spaces,one of said spaces being of greater length than the other space, andall. arranged so that the said forwardly extending members willrespectively straddle the said main body-portion and the said angularlyextending arm, and that the said forwardly extending members areslidably arranged with relation to the said main body-portion and thesaid angularly extending arm, and an outwardly extending ribconnectedwith each member, and means connected with the end-portions of saidmembers which are slidably arranged with relation to the mainbody-portion for lock- A ing the head in an angularly disposed positionwith relation to the said main bodyportion, substantially as and for thepurposes set forth.

In testimony, that I claim the invention set forth above I have hereuntoset my hand this 15th day of December, 1909.

GEORGE F. HALL.

Witnesses:

FREDK. C. FRAENTZEL, FREDK H. WV. FRAENTZEL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

